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Profile AI4FR
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Message 1135117 - Posted: 2 Aug 2011, 8:18:30 UTC - in response to Message 1134600.  

I hope you're able to come back soon JPM.
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Message 1135175 - Posted: 2 Aug 2011, 13:03:28 UTC - in response to Message 1134579.  

The idea behind S@H was to use spare cycles

I don't think it works like that any more. As soon as your computer becomes idle and BOINC starts crunching, it's going to use 100% of the CPU by default...

Isn't it true that that it's always been like that? Free cycles never meant that the electricity used when BOINC kicked in was free. Although that's what I used to think when that "free" term was used and now I know it's not so when I get my fuel bills.


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Message 1135180 - Posted: 2 Aug 2011, 13:08:39 UTC - in response to Message 1135175.  
Last modified: 2 Aug 2011, 13:08:48 UTC

Actually, I think that low-power idle instructions on the CPU were not always available. Back in the 386 and 486 days, I believe free cycles were actually free--the CPU essentially ran at 100% all the time. I could be wrong on that of course.
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Message 1135183 - Posted: 2 Aug 2011, 13:15:27 UTC - in response to Message 1135180.  

Actually, I think that low-power idle instructions on the CPU were not always available. Back in the 386 and 486 days, I believe free cycles were actually free--the CPU essentially ran at 100% all the time. I could be wrong on that of course.

Ah, so we were lending our wear and tear to BOINC and now wondering why it's an arm and a leg it's costing us.


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Message 1135192 - Posted: 2 Aug 2011, 13:38:44 UTC - in response to Message 1135180.  

Actually, I think that low-power idle instructions on the CPU were not always available. Back in the 386 and 486 days, I believe free cycles were actually free--the CPU essentially ran at 100% all the time. I could be wrong on that of course.


That's generally true, even through the Pentium II's and Pentium III's. Of course there were always low power versions of every Intel/AMD chip (the 386SLC and 486SLC are examples), but the ability to turn off unused portions of the processor or to down-clock itself is a relatively new invention.

With the advent of power saving features, distributed computing is a harder "sell" to the average person who ends up paying a higher electric bill.
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Message 1135214 - Posted: 2 Aug 2011, 14:28:12 UTC - in response to Message 1134055.  
Last modified: 2 Aug 2011, 14:30:22 UTC

There are laptops with dual GPUs. See here under the heading Gaming Laptops.

Like this one.
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Message 1136303 - Posted: 5 Aug 2011, 16:47:21 UTC - in response to Message 1136265.  


I can empathise with others on this thread, giving up.... It does look like there's now more crunchers, than there is work units... so maybe SETI is at max capacity now and doesn't need more crunchers...???

Just a thought..

Bob


Well, that's at least what it looks like. Just now when there's months and months of shortie floodings, it's certainly true. However when the telescope is used in another way, sometime in the future, and there's a more balanced production of WU's with other AR's, I think all will settle down again.

Sten, don't go optimistic on us now!

The Arecibo schedule starting August 27 shows the ALFA receiver being put back on the telescope September 1 and the A2010 ALFALFA project's fall observation campaign starting ~03:00 UTC September 6. When some of that data gets shipped to Berkeley, it will be mainly midrange ARs.

In terms of our demand versus data availability, with no ALFA observations between July 24 and September 6 I hope there's enough in HPSS storage to keep the flow going. If not, there may be an opportunity for the project to do some local maintenance or reorganization which is difficult while in full operation.

Although there's ample data from GBT to fulfill all demand for many months, I judge the project will want to do careful testing of modified applications before starting production crunching here.
                                                                 Joe
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Message 1136307 - Posted: 5 Aug 2011, 16:56:14 UTC - in response to Message 1136303.  


Sten, don't go optimistic on us now!

The Arecibo schedule starting August 27 shows the ALFA receiver being put back on the telescope September 1 and the A2010 ALFALFA project's fall observation campaign starting ~03:00 UTC September 6. When some of that data gets shipped to Berkeley, it will be mainly midrange ARs.

In terms of our demand versus data availability, with no ALFA observations between July 24 and September 6 I hope there's enough in HPSS storage to keep the flow going. If not, there may be an opportunity for the project to do some local maintenance or reorganization which is difficult while in full operation.

Although there's ample data from GBT to fulfill all demand for many months, I judge the project will want to do careful testing of modified applications before starting production crunching here.
                                                                 Joe

Thank you, Joe.
That news bodes well for the future here.
If the WU supply runs out before the September data starts arriving, the kitties will just prowl about waiting to pounce when the time is right!

"Freedom is just Chaos, with better lighting." Alan Dean Foster

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Message boards : Number crunching : Goodbye


 
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